import pytest

from tests.insn.helpers import *


@pytest.mark.parametrize("rr", set(R16) - {R16.AF})
def test_ld_rr_nn(rr):
    cpu = CPU()

    LD_RR_NN(rr, 0x1234).exec(cpu)

    assert cpu.get_reg16(rr) == 0x1234
    assert cpu.state.cycles == 12


def test_ld_nn_sp():
    cpu = CPU()
    cpu.set_reg16(R16.SP, 0xABCD)

    LD_NN_SP(0x1234).exec(cpu)

    assert cpu.get_mem16(0x1234) == 0xABCD
    assert cpu.state.cycles == 20


def test_ld_sp_hl():
    cpu = CPU()
    cpu.set_reg16(R16.HL, 0x1234)

    LD_SP_HL().exec(cpu)

    assert cpu.get_reg16(R16.SP) == 0x1234
    assert cpu.state.cycles == 8


@pytest.mark.parametrize("rr", set(R16) - {R16.AF, R16.SP})
def test_push_rr(rr):
    cpu = CPU()
    cpu.set_reg16(R16.SP, 0xFFFF)
    cpu.set_reg16(rr, 0x1234)

    PUSH_RR(rr).exec(cpu)

    assert cpu.get_reg16(R16.SP) == 0xFFFD
    assert cpu.get_mem16(0xFFFD) == 0x1234
    assert cpu.state.cycles == 16


@pytest.mark.parametrize("rr", set(R16) - {R16.AF, R16.SP})
def test_pop_rr(rr):
    cpu = CPU()
    cpu.set_reg16(R16.SP, 0xFFFD)
    cpu.set_mem16(0xFFFD, 0x1234)

    POP_RR(rr).exec(cpu)

    assert cpu.get_reg16(R16.SP) == 0xFFFF
    assert cpu.get_reg16(rr) == 0x1234
    assert cpu.state.cycles == 12